arch/arm/mach-rockchip/rk312x.c

   1 /*
   2  * Device Tree support for Rockchip RK3288
   3  *
   4  * Copyright (C) 2014 ROCKCHIP, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/clk-provider.h>
  18 #include <linux/clocksource.h>
  19 #include <linux/cpuidle.h>
  20 #include <linux/delay.h>
  21 #include <linux/init.h>
  22 #include <linux/irqchip.h>
  23 #include <linux/kernel.h>
  24 #include <linux/of_address.h>
  25 #include <linux/of_platform.h>
  26 #include <linux/rockchip/common.h>
  27 #include <linux/rockchip/cpu.h>
  28 #include <linux/rockchip/cru.h>
  29 #include <linux/rockchip/dvfs.h>
  30 #include <linux/rockchip/grf.h>
  31 #include <linux/rockchip/iomap.h>
  32 #include <linux/rockchip/pmu.h>
  33 #include <asm/cpuidle.h>
  34 #include <asm/cputype.h>
  35 #include <asm/mach/arch.h>
  36 #include <asm/mach/map.h>
  37 #include "cpu_axi.h"
  38 #include "loader.h"
  39 #define CPU 312x
  40 #include "sram.h"
  41 #include "pm.h"
  42
  43 #define RK312X_DEVICE(name) \
  44         { \
  45                 .virtual        = (unsigned long) RK_##name##_VIRT, \
  46                 .pfn            = __phys_to_pfn(RK312X_##name##_PHYS), \
  47                 .length         = RK312X_##name##_SIZE, \
  48                 .type           = MT_DEVICE, \
  49         }
  50
  51 static const char * const rk3126_dt_compat[] __initconst = {
  52         "rockchip,rk3126",
  53         NULL,
  54 };
  55
  56 static const char * const rk3128_dt_compat[] __initconst = {
  57         "rockchip,rk3128",
  58         NULL,
  59 };
  60
  61 #define RK312X_IMEM_VIRT (RK_BOOTRAM_VIRT + SZ_32K)
  62 #define RK312X_TIMER5_VIRT (RK_TIMER_VIRT + 0xa0)
  63
  64 static struct map_desc rk312x_io_desc[] __initdata = {
  65         RK312X_DEVICE(CRU),
  66         RK312X_DEVICE(GRF),
  67         RK312X_DEVICE(ROM),
  68         RK312X_DEVICE(EFUSE),
  69         RK312X_DEVICE(TIMER),
  70         RK_DEVICE(RK_DEBUG_UART_VIRT, RK312X_UART2_PHYS, RK312X_UART_SIZE),
  71         RK_DEVICE(RK_DDR_VIRT, RK312X_DDR_PCTL_PHYS, RK312X_DDR_PCTL_SIZE),
  72         RK_DEVICE(RK_DDR_VIRT + RK312X_DDR_PCTL_SIZE, RK312X_DDR_PHY_PHYS, RK312X_DDR_PHY_SIZE),
  73         RK_DEVICE(RK_GPIO_VIRT(0), RK312X_GPIO0_PHYS, RK312X_GPIO_SIZE),
  74         RK_DEVICE(RK_GPIO_VIRT(1), RK312X_GPIO1_PHYS, RK312X_GPIO_SIZE),
  75         RK_DEVICE(RK_GPIO_VIRT(2), RK312X_GPIO2_PHYS, RK312X_GPIO_SIZE),
  76         RK_DEVICE(RK_GPIO_VIRT(3), RK312X_GPIO3_PHYS, RK312X_GPIO_SIZE),
  77         RK_DEVICE(RK_GIC_VIRT, RK312X_GIC_DIST_PHYS, RK312X_GIC_DIST_SIZE),
  78         RK_DEVICE(RK_GIC_VIRT + RK312X_GIC_DIST_SIZE, RK312X_GIC_CPU_PHYS, RK312X_GIC_CPU_SIZE),
  79         RK_DEVICE(RK312X_IMEM_VIRT, RK312X_IMEM_PHYS, SZ_4K),
  80 };
  81
  82 static void __init rk312x_dt_map_io(void)
  83 {
  84         iotable_init(rk312x_io_desc, ARRAY_SIZE(rk312x_io_desc));
  85         debug_ll_io_init();
  86
  87         /* enable timer5 for core */
  88         writel_relaxed(0, RK312X_TIMER5_VIRT + 0x10);
  89         dsb();
  90         writel_relaxed(0xFFFFFFFF, RK312X_TIMER5_VIRT + 0x00);
  91         writel_relaxed(0xFFFFFFFF, RK312X_TIMER5_VIRT + 0x04);
  92         dsb();
  93         writel_relaxed(1, RK312X_TIMER5_VIRT + 0x10);
  94         dsb();
  95 }
  96
  97 static void __init rk3126_dt_map_io(void)
  98 {
  99         rockchip_soc_id = ROCKCHIP_SOC_RK3126;
 100
 101         rk312x_dt_map_io();
 102 }
 103
 104 static void __init rk3128_dt_map_io(void)
 105 {
 106         rockchip_soc_id = ROCKCHIP_SOC_RK3128;
 107
 108         rk312x_dt_map_io();
 109 }
 110
 111 static void __init rk312x_dt_init_timer(void)
 112 {
 113         of_clk_init(NULL);
 114         clocksource_of_init();
 115         of_dvfs_init();
 116 }
 117
 118 static void __init rk312x_reserve(void)
 119 {
 120 }
 121
 122 static void __init rk312x_init_late(void)
 123 {
 124 }
 125
 126 static void rk312x_restart(char mode, const char *cmd)
 127 {
 128 }
 129
 130 DT_MACHINE_START(RK3126_DT, "Rockchip RK3126")
 131         .smp            = smp_ops(rockchip_smp_ops),
 132         .map_io         = rk3126_dt_map_io,
 133         .init_time      = rk312x_dt_init_timer,
 134         .dt_compat      = rk3126_dt_compat,
 135         .init_late      = rk312x_init_late,
 136         .reserve        = rk312x_reserve,
 137         .restart        = rk312x_restart,
 138 MACHINE_END
 139
 140 DT_MACHINE_START(RK3128_DT, "Rockchip RK3128")
 141         .smp            = smp_ops(rockchip_smp_ops),
 142         .map_io         = rk3128_dt_map_io,
 143         .init_time      = rk312x_dt_init_timer,
 144         .dt_compat      = rk3128_dt_compat,
 145         .init_late      = rk312x_init_late,
 146         .reserve        = rk312x_reserve,
 147         .restart        = rk312x_restart,
 148 MACHINE_END
 149
 150
 151 char PIE_DATA(sram_stack)[1024];
 152 EXPORT_PIE_SYMBOL(DATA(sram_stack));
 153
 154 static int __init rk312x_pie_init(void)
 155 {
 156         int err;
 157
 158         if (!cpu_is_rk312x())
 159                 return 0;
 160
 161         err = rockchip_pie_init();
 162         if (err)
 163                 return err;
 164
 165         rockchip_pie_chunk = pie_load_sections(rockchip_sram_pool, rk312x);
 166         if (IS_ERR(rockchip_pie_chunk)) {
 167                 err = PTR_ERR(rockchip_pie_chunk);
 168                 pr_err("%s: failed to load section %d\n", __func__, err);
 169                 rockchip_pie_chunk = NULL;
 170                 return err;
 171         }
 172
 173         rockchip_sram_virt = kern_to_pie(rockchip_pie_chunk, &__pie_common_start[0]);
 174         rockchip_sram_stack = kern_to_pie(rockchip_pie_chunk, (char *)DATA(sram_stack) + sizeof(DATA(sram_stack)));
 175
 176         return 0;
 177 }
 178 arch_initcall(rk312x_pie_init);